Why are FA Cup semi-finals played at Wembley?

BBC Sport looks at why FA Cup semi-finals are played at the national stadium. | Source: BBC Sport
Ralated News
0. Crystal Palace demoted from Europa League to Conference League after UEFA finally rules FA Cup winners breached multi-club ownership rules - Goal.com1. Naga Munchetty: ‘When did I last cry? Watching Crystal Palace win the FA Cup final’ - The Guardian
2. Crystal Palace: Why are Nottingham Forest set to replace them in Europa League? - BBC
3. Palace out of Europa League amid Lyon conflict - ESPN India
4. Crystal Palace thrown out of Europa League and demoted to Conference League by UEFA - Metro.co.uk
5. 'One of the greatest injustices' - Crystal Palace chairman Steve Parish fumes at UEFA ruling after the FA Cup winners are demoted to the Conference League - Goal.com
6. Textor admits Palace UEL fears after Cup final - ESPN India
7. John Textor admits Europa League worries as Crystal Palace lifted FA Cup despite insisting documents prove no decisive influence - Sky Sports
8. John Textor: Crystal Palace co-owner had European fears moments after lifting FA Cup - BBC
9. Millwall fined £15,000 for homophobic chants at Crystal Palace in FA Cup - BBC